Glass knob



(Specimens.)

E. A. FOY.

GLASS KNOB.

No. 403,340. Patented May 14, 1889.

N. PEIERS. Pholo-Lilhugnpher. washin a c UNITED STATES PATENT OFFICE.

EDWARD A. FOY, OF CINCINNATI, OHIO.

GLASS KNOB.

SPECIFICATION forming part of Letters Patent No. 403,340, dated May 14, 1889.

Application filed August 13 1888.

To aZZ w iwm it may concern.-

Be it known that I, EDWARD A. FOY, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Glass Knobs, Ornaments, &c., of which the following is a specification.

The object of my invention is a glass knob for curtain-poles, doors, and similar uses, made to perfectly imitate brass, and which- Will, on account of its cleanliness, non-liability to corrode, and cheapness, supersede the ordinary brass knob or ornament. Its object is also a convenient means for attaching the knobs or ornaments in place.

The invention will be first fully described in connection with the accompanying drawings, and will then be particularly referred to and pointed out in the c aim.

In the accompanying drawings, Figure 1 is an axial section of a curtain-pole knob embodying my invention. Fig. 2 is a similar view of a door-knob.

In carrying out my invention I first prepare the body of the article, whether it be a curtain-knob, A, Fig. 1, or a door-knob, A, Fig. 2, of amber-colored glass hollow in the center and of any design or shape that the taste or fancy of the constructor may suggest. I then coat the inside of the article with a solution of nitrate of silver, represented by B. This, combined with the amber-glass, gives the article a metallic appearance which can only upon close inspection be distinguished from brass. The opening in the article is then hermetically sealed to prevent oxidation or tarnishing of the metallic coating, and the sealing material is also utilized to securely hold Serial No. 282,496. (Specimens) the screw or other device by means of which the article is attached for use.

In the case of the curtain-pole knob, Fig. 1, or a similar article which is used principally for the purpose of ornamentation, I flatten off the opposite sides of the head of the ordinary wood-screw, O, and then I embed or countersink the angular head in a recess in the end of a wooden plug, D, of a size to drop loosely into the mouth of the coated glass article, the flange or outer rim of which projects inwardly, forming a more enlarged or interior cavity, a, to receive the cement E, which closes the'cavity between the outer end of the plug and the mouth or outer opening of the coated glass article and securely holds the screw and plug from turning while the knob is being screwed to place.

In the case of the door knob, Fig. 2, the cement is poured into the cavity of the knob after the interior coating has been applied, and while the cement is still in the plastic state the neck F, which is to receive the shank or spindle for throwing the lock or latch, is forced into place. When the cement has hardened, the neck is held firmly from turning or from displacement. The portion'of the shank within the knob is made angular and the exterior formed with depressions for this purpose.

I claim as my invention- A hollow amber-colored glass knob coated upon the inside with a solution of silver, as a new article of manufacture.

EDWARD A. FOY.

Witnesses:

FRANK L. MILLWARD, GEO. J. MURRAY. 

